Analyze and compare two- and three-dimensional shapes, in different sizes and orientations, using informal language to describe their similarities, differences, parts (e.g., number of sides and vertices/"corners") and other attributes (e.g., having sides of equal length).

Grade levels
K

Model shapes in the world by building shapes from components (e.g., sticks and clay balls) and drawing shapes.

Grade levels
K

Compose simple shapes to form larger shapes. For example, "Can you join these two triangles with full sides touching to make a rectangle?"

Grade levels
K

Describe measurable attributes of objects, such as length or weight. Describe several measurable attributes of a single object.

Grade levels
K

Directly compare two objects with a measurable attribute in common, to see which object has "more of"/"less of" the attribute, and describe the difference. For example, directly compare the heights of two children and describe one child as taller/shorter.

Grade levels
K

Classify objects into given categories; count the numbers of objects in each category and sort the categories by count.¹

Grade levels
K